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Commit bb70b680 authored by Douglas Gilbert's avatar Douglas Gilbert Committed by James Bottomley
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Here is an update for scsi_debug that utilizes driverfs 

support for per driver parameters added in lk 2.5.31

1.62 changes:
  - driverfs support for these options (more to come):
    /driverfs/bus/scsi/drivers/scsi_debug/delay [rw]
    /driverfs/bus/scsi/drivers/scsi_debug/num_devs [r]
    /driverfs/bus/scsi/drivers/scsi_debug/opts [rw]
  - start using some C99
  - fdisk requires EINVAL from unsupported ioctls
    (scsi_debug previously used ENOTTY)

1.61 changes:
  - simulate delayed responses, controlled by
    'scsi_debug_delay'
  - support REPORT LUNS
  - support more MODE SENSE pages
  - [following Doug Ledford's suggestion] do autosense
    (i.e. set Scsi_Cmnd::sense_buffer array appropriately
     when a status of CHECK CONDITION is set)
  - minor driverfs support
  - start adding error injection logic, see
    "scsi_debug_every_nth"

Doug Gilbert
parent fcc6fcc6
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Showing with 674 additions and 534 deletions
drivers/scsi/scsi_debug.c
View file @ bb70b680
/* $Id: scsi_debug.c,v 1.1 1992/07/24 06:27:38 root Exp root $
/*
* linux/kernel/scsi_debug.c
*
* Copyright (C) 1992 Eric Youngdale
......@@ -12,10 +12,11 @@
*
* For documentation see http://www.torque.net/sg/sdebug.html
*
* D. Gilbert (dpg) work for MOD device test [20010421]
* dpg, work for devfs large number of disks [20010809]
* dpg, forked for lk 2.5 series [20011216, 20020101]
* dpg, use vmalloc() more inquiry+mode_sense [20020302]
* D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
* dpg: work for devfs large number of disks [20010809]
* forked for lk 2.5 series [20011216, 20020101]
* use vmalloc() more inquiry+mode_sense [20020302]
* add timers for delayed responses [20020721]
*/
#include <linux/config.h>
......@@ -46,7 +47,12 @@
#include <linux/version.h>
#endif
static char scsi_debug_version_str[] = "Version: 1.59 (20020302)";
#include "scsi_debug.h"
static const char * scsi_debug_version_str = "Version: 1.62 (20020812)";
#define DRIVERFS_SUPPORT 1 /* comment out whole line to disable */
#ifndef SCSI_CMD_READ_16
#define SCSI_CMD_READ_16 0x88
......@@ -54,29 +60,36 @@ static char scsi_debug_version_str[] = "Version: 1.59 (20020302)";
#ifndef SCSI_CMD_WRITE_16
#define SCSI_CMD_WRITE_16 0x8a
#endif
#ifndef REPORT_LUNS
#define REPORT_LUNS 0xa0
#endif
/* A few options that we want selected */
#define DEF_NR_FAKE_DEVS 1
#define DEF_DEV_SIZE_MB 8
#define DEF_FAKE_BLK0 0
#define DEF_EVERY_NTH 100
#define DEF_DELAY 1
#define DEF_OPTS 0
#define SCSI_DEBUG_OPT_NOISE 1
#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
#define SCSI_DEBUG_OPT_EVERY_NTH 4
#define OPT_MEDIUM_ERR_ADDR 0x1234
static int scsi_debug_num_devs = DEF_NR_FAKE_DEVS;
static int scsi_debug_opts = DEF_OPTS;
static int scsi_debug_every_nth = DEF_EVERY_NTH;
static int scsi_debug_cmnd_count = 0;
static int scsi_debug_delay = DEF_DELAY;
#define NR_HOSTS_PRESENT (((scsi_debug_num_devs - 1) / 7) + 1)
#define N_HEAD 8
#define N_SECTOR 32
#define DEV_READONLY(TGT) (0)
#define DEV_REMOVEABLE(TGT) (0)
#define DEVICE_TYPE(TGT) (TYPE_DISK);
#define SCSI_DEBUG_MAILBOXES (scsi_debug_num_devs + 1)
#define PERIPH_DEVICE_TYPE(TGT) (TYPE_DISK);
static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
#define STORE_SIZE (scsi_debug_dev_size_mb * 1024 * 1024)
......@@ -87,81 +100,79 @@ static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
#define N_CYLINDER (STORE_SIZE / (SECT_SIZE * N_SECTOR * N_HEAD))
/* Do not attempt to use a timer to simulate a real disk with latency */
/* Only use this in the actual kernel, not in the simulator. */
#define IMMEDIATE
#define START_PARTITION 4
/* Time to wait before completing a command */
#define DISK_SPEED (HZ/10) /* 100ms */
#define CAPACITY (N_HEAD * N_SECTOR * N_CYLINDER)
#define SECT_SIZE_PER(TGT) SECT_SIZE
static int starts[] =
{N_SECTOR,
N_HEAD * N_SECTOR, /* Single cylinder */
N_HEAD * N_SECTOR * 4,
0 /* CAPACITY */, 0};
static unsigned char * fake_storep;
#define SDEBUG_SENSE_LEN 32
typedef struct sdebug_dev_info {
struct sdebug_dev_info {
Scsi_Device * sdp;
unsigned short host_no;
unsigned short id;
unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
char reset;
char sb_index;
} Sdebug_dev_info;
static Sdebug_dev_info * devInfop;
};
static struct sdebug_dev_info * devInfop;
typedef void (* done_funct_t) (Scsi_Cmnd *);
struct sdebug_queued_cmd {
int in_use;
struct timer_list cmnd_timer;
done_funct_t done_funct;
struct scsi_cmnd * a_cmnd;
int scsi_result;
};
static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
static unsigned char * fake_storep; /* ramdisk storage */
static unsigned char broken_buff[SDEBUG_SENSE_LEN];
static int num_aborts = 0;
static int num_dev_resets = 0;
static int num_bus_resets = 0;
static int num_host_resets = 0;
static spinlock_t mailbox_lock = SPIN_LOCK_UNLOCKED;
static rwlock_t sdebug_atomic_rw = RW_LOCK_UNLOCKED;
#include "scsi_debug.h"
static spinlock_t queued_arr_lock = SPIN_LOCK_UNLOCKED;
static rwlock_t atomic_rw = RW_LOCK_UNLOCKED;
typedef void (*done_fct_t) (Scsi_Cmnd *);
static volatile done_fct_t * do_done = 0;
static struct Scsi_Host * SHpnt = NULL;
#ifdef DRIVERFS_SUPPORT
static struct device_driver sdebug_driverfs_driver;
#endif
static int scsi_debug_inquiry(unsigned char * cmd, int target,
unsigned char * buff, int bufflen,
Sdebug_dev_info * devip);
static int scsi_debug_mode_sense(unsigned char * cmd, int target,
/* function declarations */
static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
int bufflen, struct sdebug_dev_info * devip);
static int resp_mode_sense(unsigned char * cmd, int target,
unsigned char * buff, int bufflen,
Sdebug_dev_info * devip);
static int scsi_debug_read(Scsi_Cmnd * SCpnt, int upper_blk, int block,
int num, int * errstsp, Sdebug_dev_info * devip);
static int scsi_debug_write(Scsi_Cmnd * SCpnt, int upper_blk, int block,
int num, int * errstsp, Sdebug_dev_info * devip);
static void scsi_debug_intr_handle(unsigned long);
static Sdebug_dev_info * devInfoReg(Scsi_Device * sdp);
static void mk_sense_buffer(Sdebug_dev_info * devip, int index, int key,
struct sdebug_dev_info * devip);
static int resp_read(Scsi_Cmnd * SCpnt, int upper_blk, int block,
int num, struct sdebug_dev_info * devip);
static int resp_write(Scsi_Cmnd * SCpnt, int upper_blk, int block, int num,
struct sdebug_dev_info * devip);
static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
int bufflen, struct sdebug_dev_info * devip);
static void timer_intr_handler(unsigned long);
static struct sdebug_dev_info * devInfoReg(Scsi_Device * sdp);
static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
int asc, int asq, int inbandLen);
static int check_reset(Scsi_Cmnd * SCpnt, Sdebug_dev_info * devip);
static struct timer_list * timeout = 0;
static Scsi_Cmnd ** SCint = 0;
/*
* Semaphore used to simulate bus lockups.
*/
static int scsi_debug_lockup = 0;
#define NUM_SENSE_BUFFS 4
#define SENSE_BUFF_LEN 32
static char sense_buffers[NUM_SENSE_BUFFS][SENSE_BUFF_LEN];
static int check_reset(Scsi_Cmnd * SCpnt, struct sdebug_dev_info * devip);
static int schedule_resp(struct scsi_cmnd * cmnd,
struct sdebug_dev_info * devip,
done_funct_t done, int scsi_result, int delta_jiff);
static void init_all_queued(void);
static void stop_all_queued(void);
static int stop_queued_cmnd(struct scsi_cmnd * cmnd);
static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
const char * dev_id_str, int dev_id_str_len);
#ifdef DRIVERFS_SUPPORT
static void do_create_driverfs_files(void);
static void do_remove_driverfs_files(void);
#endif
static inline
unsigned char * sdebug_scatg2virt(const struct scatterlist * sclp)
static unsigned char * scatg2virt(const struct scatterlist * sclp)
{
if (NULL == sclp)
return NULL;
......@@ -173,61 +184,47 @@ unsigned char * sdebug_scatg2virt(const struct scatterlist * sclp)
}
static
int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, done_funct_t done)
{
unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
int block;
int upper_blk;
unsigned char *buff;
int scsi_debug_errsts;
int errsts = 0;
int target = SCpnt->target;
int bufflen = SCpnt->request_bufflen;
unsigned long iflags;
int i, num, capac;
Sdebug_dev_info * devip = NULL;
char * sbuff;
int num, capac;
struct sdebug_dev_info * devip = NULL;
unsigned char * sbuff;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
printk(KERN_INFO "scsi_debug: queue_command: cmd ");
for (i = 0, num = SCpnt->cmd_len; i < num; ++i)
printk("%02x ", cmd[i]);
printk(" use_sg=%d\n", SCpnt->use_sg);
}
/*
* If we are being notified of the mid-level reposessing a command
* due to timeout, just return.
*/
if (done == NULL) {
return 0;
}
if (done == NULL)
return 0; /* assume mid level reprocessing command */
if (SCpnt->use_sg) { /* just use first element */
struct scatterlist *sgpnt = (struct scatterlist *)
SCpnt->request_buffer;
buff = sdebug_scatg2virt(&sgpnt[0]);
buff = scatg2virt(&sgpnt[0]);
bufflen = sgpnt[0].length;
/* READ and WRITE process scatterlist themselves */
}
else
buff = (unsigned char *) SCpnt->request_buffer;
/*
* If a command comes for the ID of the host itself, just print
* a silly message and return.
*/
if(target == 7) {
printk(KERN_WARNING "How do you do!\n");
SCpnt->result = 0;
done(SCpnt);
return 0;
if (NULL == buff) {
printk(KERN_WARNING "scsi_debug:qc: buff was NULL??\n");
buff = broken_buff; /* just point at dummy */
bufflen = SDEBUG_SENSE_LEN;
}
if ((target > 7) || (SCpnt->lun != 0)) {
SCpnt->result = DID_NO_CONNECT << 16;
done(SCpnt);
return 0;
if(target == driver_template.this_id) {
printk(KERN_WARNING
"scsi_debug: initiator's id used as target!\n");
return schedule_resp(SCpnt, NULL, done, 0, 0);
}
if ((target > driver_template.this_id) || (SCpnt->lun != 0))
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
#if 0
printk(KERN_INFO "sdebug:qc: host_no=%d, id=%d, sdp=%p, cmd=0x%x\n",
(int)SCpnt->device->host->host_no, (int)SCpnt->device->id,
......@@ -235,101 +232,93 @@ int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
#endif
if (NULL == SCpnt->device->hostdata) {
devip = devInfoReg(SCpnt->device);
if (NULL == devip) {
SCpnt->result = DID_NO_CONNECT << 16;
done(SCpnt);
return 0;
}
if (NULL == devip)
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
SCpnt->device->hostdata = devip;
}
devip = SCpnt->device->hostdata;
if ((SCSI_DEBUG_OPT_EVERY_NTH & scsi_debug_opts) &&
(scsi_debug_every_nth > 0) &&
(++scsi_debug_cmnd_count >= scsi_debug_every_nth)) {
scsi_debug_cmnd_count =0;
return 0; /* ignore command causing timeout */
}
switch (*cmd) {
case INQUIRY: /* mandatory */
scsi_debug_errsts = scsi_debug_inquiry(cmd, target, buff,
bufflen, devip);
/* assume INQUIRY called first so setup max_cmd_len */
if (SCpnt->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
SCpnt->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
errsts = resp_inquiry(cmd, target, buff, bufflen, devip);
break;
case REQUEST_SENSE: /* mandatory */
SCSI_LOG_LLQUEUE(3, printk("Request sense...\n"));
/* Since this driver indicates autosense by placing the
* sense buffer in the scsi_cmnd structure in the response
* (when CHECK_CONDITION is set), the mid level shouldn't
* need to call REQUEST_SENSE */
if (devip) {
sbuff = &sense_buffers[(int)devip->sb_index][0];
devip->sb_index = 0;
sbuff = devip->sense_buff;
memcpy(buff, sbuff, (bufflen < SDEBUG_SENSE_LEN) ?
bufflen : SDEBUG_SENSE_LEN);
mk_sense_buffer(devip, 0, 0x0, 0, 7);
} else {
memset(buff, 0, bufflen);
buff[0] = 0x70;
}
else
sbuff = &sense_buffers[0][0];
memcpy(buff, sbuff, (bufflen < SENSE_BUFF_LEN) ?
bufflen : SENSE_BUFF_LEN);
memset(sbuff, 0, SENSE_BUFF_LEN);
sbuff[0] = 0x70;
SCpnt->result = 0;
done(SCpnt);
return 0;
break;
case START_STOP:
if (check_reset(SCpnt, devip)) {
done(SCpnt);
return 0;
}
SCSI_LOG_LLQUEUE(3, printk("START_STOP\n"));
scsi_debug_errsts = 0;
errsts = check_reset(SCpnt, devip);
break;
case ALLOW_MEDIUM_REMOVAL:
if (check_reset(SCpnt, devip)) {
done(SCpnt);
return 0;
}
if (cmd[4]) {
SCSI_LOG_LLQUEUE(2, printk(
"Medium removal inhibited..."));
} else {
SCSI_LOG_LLQUEUE(2,
printk("Medium removal enabled..."));
}
scsi_debug_errsts = 0;
if ((errsts = check_reset(SCpnt, devip)))
break;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk("\tMedium removal %s\n",
cmd[4] ? "inhibited" : "enabled");
break;
case SEND_DIAGNOSTIC: /* mandatory */
SCSI_LOG_LLQUEUE(3, printk("Send Diagnostic\n"));
if (buff)
memset(buff, 0, bufflen);
scsi_debug_errsts = 0;
break;
case TEST_UNIT_READY: /* mandatory */
SCSI_LOG_LLQUEUE(3, printk("Test unit ready(%p %d)\n",
buff, bufflen));
if (buff)
memset(buff, 0, bufflen);
scsi_debug_errsts = 0;
break;
case RESERVE:
errsts = check_reset(SCpnt, devip);
memset(buff, 0, bufflen);
break;
case RESERVE_10:
errsts = check_reset(SCpnt, devip);
memset(buff, 0, bufflen);
break;
case RELEASE:
errsts = check_reset(SCpnt, devip);
memset(buff, 0, bufflen);
break;
case RELEASE_10:
errsts = check_reset(SCpnt, devip);
memset(buff, 0, bufflen);
break;
case READ_CAPACITY:
if (check_reset(SCpnt, devip)) {
done(SCpnt);
return 0;
}
SCSI_LOG_LLQUEUE(3, printk("Read Capacity\n"));
SHpnt = SCpnt->host;
errsts = check_reset(SCpnt, devip);
memset(buff, 0, bufflen);
if (bufflen > 7) {
capac = CAPACITY - 1;
buff[0] = (capac >> 24);
buff[1] = (capac >> 16) & 0xff;
buff[2] = (capac >> 8) & 0xff;
buff[3] = capac & 0xff;
buff[4] = 0;
buff[5] = 0;
buff[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
buff[7] = SECT_SIZE_PER(target) & 0xff;
scsi_debug_errsts = 0;
}
break;
case SCSI_CMD_READ_16: /* SBC-2 */
case READ_12:
case READ_10:
case READ_6:
if (check_reset(SCpnt, devip)) {
done(SCpnt);
return 0;
}
if ((errsts = check_reset(SCpnt, devip)))
break;
upper_blk = 0;
if ((*cmd) == SCSI_CMD_READ_16) {
upper_blk = cmd[5] + (cmd[4] << 8) +
......@@ -338,38 +327,31 @@ int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
(cmd[7] << 16) + (cmd[6] << 24);
num = cmd[13] + (cmd[12] << 8) +
(cmd[11] << 16) + (cmd[10] << 24);
}
else if ((*cmd) == READ_12) {
} else if ((*cmd) == READ_12) {
block = cmd[5] + (cmd[4] << 8) +
(cmd[3] << 16) + (cmd[2] << 24);
num = cmd[9] + (cmd[8] << 8) +
(cmd[7] << 16) + (cmd[6] << 24);
}
else if ((*cmd) == READ_10) {
} else if ((*cmd) == READ_10) {
block = cmd[5] + (cmd[4] << 8) +
(cmd[3] << 16) + (cmd[2] << 24);
num = cmd[8] + (cmd[7] << 8);
}
else {
} else {
block = cmd[3] + (cmd[2] << 8) +
((cmd[1] & 0x1f) << 16);
num = cmd[4];
}
if (scsi_debug_read(SCpnt, upper_blk, block, num,
&scsi_debug_errsts, devip))
errsts = resp_read(SCpnt, upper_blk, block, num, devip);
break;
case REPORT_LUNS:
errsts = resp_report_luns(cmd, buff, bufflen, devip);
break;
SCpnt->result = 0;
/* calls bottom half in upper layers before return from scsi_do_...() */
(done) (SCpnt);
return 0;
case SCSI_CMD_WRITE_16: /* SBC-2 */
case WRITE_12:
case WRITE_10:
case WRITE_6:
if (check_reset(SCpnt, devip)) {
done(SCpnt);
return 0;
}
if ((errsts = check_reset(SCpnt, devip)))
break;
upper_blk = 0;
if ((*cmd) == SCSI_CMD_WRITE_16) {
upper_blk = cmd[5] + (cmd[4] << 8) +
......@@ -378,97 +360,38 @@ int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
(cmd[7] << 16) + (cmd[6] << 24);
num = cmd[13] + (cmd[12] << 8) +
(cmd[11] << 16) + (cmd[10] << 24);
}
else if ((*cmd) == WRITE_12) {
} else if ((*cmd) == WRITE_12) {
block = cmd[5] + (cmd[4] << 8) +
(cmd[3] << 16) + (cmd[2] << 24);
num = cmd[9] + (cmd[8] << 8) +
(cmd[7] << 16) + (cmd[6] << 24);
}
else if ((*cmd) == WRITE_10) {
} else if ((*cmd) == WRITE_10) {
block = cmd[5] + (cmd[4] << 8) +
(cmd[3] << 16) + (cmd[2] << 24);
num = cmd[8] + (cmd[7] << 8);
}
else {
} else {
block = cmd[3] + (cmd[2] << 8) +
((cmd[1] & 0x1f) << 16);
num = cmd[4];
}
if (scsi_debug_write(SCpnt, upper_blk, block, num,
&scsi_debug_errsts, devip))
errsts = resp_write(SCpnt, upper_blk, block, num, devip);
break;
SCpnt->result = 0;
/* calls bottom half in upper layers before return from scsi_do_...() */
(done) (SCpnt);
return 0;
case MODE_SENSE:
case MODE_SENSE_10:
scsi_debug_errsts =
scsi_debug_mode_sense(cmd, target, buff, bufflen, devip);
errsts = resp_mode_sense(cmd, target, buff, bufflen, devip);
break;
default:
#if 0
printk(KERN_INFO "scsi_debug: Unsupported command, "
"opcode=0x%x\n", (int)cmd[0]);
#endif
if (check_reset(SCpnt, devip)) {
done(SCpnt);
return 0;
}
scsi_debug_errsts = (COMMAND_COMPLETE << 8) |
(CHECK_CONDITION << 1);
mk_sense_buffer(devip, 2, ILLEGAL_REQUEST, 0x20, 0, 14);
if ((errsts = check_reset(SCpnt, devip)))
break;
}
spin_lock_irqsave(&mailbox_lock, iflags);
for (i = 0; i < SCSI_DEBUG_MAILBOXES; i++) {
if (timeout[i].function == NULL)
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x20, 0, 14);
errsts = (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
break;
}
/*
* If all of the slots are full, just return 1. The new error
* handling scheme allows this, and the mid-level should queue things.
*/
if (i >= SCSI_DEBUG_MAILBOXES || timeout[i].function != 0) {
SCSI_LOG_LLQUEUE(1, printk("Command rejected - host busy\n"));
spin_unlock_irqrestore(&mailbox_lock, iflags);
return 1;
}
SCSI_LOG_LLQUEUE(1, printk("Command accepted - slot %d\n", i));
#ifdef IMMEDIATE
if (!scsi_debug_lockup) {
SCpnt->result = scsi_debug_errsts;
SCint[i] = SCpnt;
do_done[i] = done;
scsi_debug_intr_handle(i); /* No timer - do this one right away */
}
spin_unlock_irqrestore(&mailbox_lock, iflags);
#else
SCpnt->result = scsi_debug_errsts;
timeout[i].function = scsi_debug_intr_handle;
timeout[i].data = i;
timeout[i].expires = jiffies + DISK_SPEED;
SCint[i] = SCpnt;
do_done[i] = done;
spin_unlock_irqrestore(&mailbox_lock, iflags);
add_timer(&timeout[i]);
if (!done)
printk(KERN_ERR "scsi_debug_queuecommand: "
"done can't be NULL\n");
#if 0
printk(KERN_INFO "Sending command (%d %x %d %d)...", i, done,
timeout[i].expires, jiffies);
#endif
#endif
return 0;
return schedule_resp(SCpnt, devip, done, errsts, scsi_debug_delay);
}
static int scsi_debug_ioctl(Scsi_Device *dev, int cmd, void *arg)
......@@ -476,58 +399,101 @@ static int scsi_debug_ioctl(Scsi_Device *dev, int cmd, void *arg)
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
}
return -ENOTTY;
return -EINVAL;
/* return -ENOTTY; // correct return but upsets fdisk */
}
static int check_reset(Scsi_Cmnd * SCpnt, Sdebug_dev_info * devip)
static int check_reset(Scsi_Cmnd * SCpnt, struct sdebug_dev_info * devip)
{
if (devip->reset) {
devip->reset = 0;
mk_sense_buffer(devip, 3, UNIT_ATTENTION, 0x29, 0, 14);
SCpnt->result = (COMMAND_COMPLETE << 8) |
(CHECK_CONDITION << 1);
return 1;
mk_sense_buffer(devip, UNIT_ATTENTION, 0x29, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
return 0;
}
#define SDEBUG_MAX_INQ_SZ 58
#define SDEBUG_LONG_INQ_SZ 58
#define SDEBUG_MAX_INQ_ARR_SZ 128
static int scsi_debug_inquiry(unsigned char * cmd, int target,
unsigned char * buff, int bufflen,
Sdebug_dev_info * devip)
static const char * vendor_id = "Linux ";
static const char * product_id = "scsi_debug ";
static const char * product_rev = "0004";
static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
const char * dev_id_str, int dev_id_str_len)
{
int num;
/* Two identification descriptors: */
/* T10 vendor identifier field format (faked) */
arr[0] = 0x2; /* ASCII */
arr[1] = 0x1;
arr[2] = 0x0;
memcpy(&arr[4], vendor_id, 8);
memcpy(&arr[12], product_id, 16);
memcpy(&arr[28], dev_id_str, dev_id_str_len);
num = 8 + 16 + dev_id_str_len;
arr[3] = num;
num += 4;
/* NAA IEEE registered identifier (faked) */
arr[num] = 0x1; /* binary */
arr[num + 1] = 0x3;
arr[num + 2] = 0x0;
arr[num + 3] = 0x8;
arr[num + 4] = 0x51; /* ieee company id=0x123456 (faked) */
arr[num + 5] = 0x23;
arr[num + 6] = 0x45;
arr[num + 7] = 0x60;
arr[num + 8] = (dev_id_num >> 24);
arr[num + 9] = (dev_id_num >> 16) & 0xff;
arr[num + 10] = (dev_id_num >> 8) & 0xff;
arr[num + 11] = dev_id_num & 0xff;
return num + 12;
}
static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
int bufflen, struct sdebug_dev_info * devip)
{
unsigned char pq_pdt;
unsigned char arr[SDEBUG_MAX_INQ_SZ];
int min_len = bufflen > SDEBUG_MAX_INQ_SZ ?
SDEBUG_MAX_INQ_SZ : bufflen;
unsigned char arr[SDEBUG_MAX_INQ_ARR_SZ];
int min_len = bufflen > SDEBUG_MAX_INQ_ARR_SZ ?
SDEBUG_MAX_INQ_ARR_SZ : bufflen;
SCSI_LOG_LLQUEUE(3, printk("Inquiry...(%p %d)\n", buff, bufflen));
if (bufflen < cmd[4])
printk(KERN_INFO "scsi_debug: inquiry: bufflen=%d "
"< alloc_length=%d\n", bufflen, (int)cmd[4]);
memset(buff, 0, bufflen);
memset(arr, 0, SDEBUG_MAX_INQ_SZ);
pq_pdt = DEVICE_TYPE(target);
memset(arr, 0, SDEBUG_MAX_INQ_ARR_SZ);
pq_pdt = PERIPH_DEVICE_TYPE(target);
arr[0] = pq_pdt;
if (0x2 & cmd[1]) { /* CMDDT bit set */
mk_sense_buffer(devip, 1, ILLEGAL_REQUEST, 0x24, 0, 14);
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x24, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
else if (0x1 & cmd[1]) { /* EVPD bit set */
} else if (0x1 & cmd[1]) { /* EVPD bit set */
int dev_id_num, len;
char dev_id_str[6];
dev_id_num = ((devip->sdp->host->host_no + 1) * 1000) +
devip->sdp->id;
len = snprintf(dev_id_str, 6, "%d", dev_id_num);
len = (len > 6) ? 6 : len;
if (0 == cmd[2]) { /* supported vital product data pages */
arr[3] = 1;
arr[4] = 0x80; /* ... only unit serial number */
}
else if (0x80 == cmd[2]) { /* unit serial number */
arr[3] = 3;
arr[4] = 0x0; /* this page */
arr[5] = 0x80; /* unit serial number */
arr[6] = 0x83; /* device identification */
} else if (0x80 == cmd[2]) { /* unit serial number */
arr[1] = 0x80;
arr[3] = 4;
arr[4] = '1'; arr[5] = '2'; arr[6] = '3';
arr[7] = '4';
}
else {
arr[3] = len;
memcpy(&arr[4], dev_id_str, len);
} else if (0x83 == cmd[2]) { /* device identification */
arr[1] = 0x83;
arr[3] = inquiry_evpd_83(&arr[4], dev_id_num,
dev_id_str, len);
} else {
/* Illegal request, invalid field in cdb */
mk_sense_buffer(devip, 1, ILLEGAL_REQUEST, 0x24, 0, 14);
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x24, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
memcpy(buff, arr, min_len);
......@@ -536,18 +502,18 @@ static int scsi_debug_inquiry(unsigned char * cmd, int target,
/* drops through here for a standard inquiry */
arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
arr[2] = 3; /* claim SCSI 3 */
arr[4] = SDEBUG_MAX_INQ_SZ - 5;
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
arr[7] = 0x3a; /* claim: WBUS16, SYNC, LINKED + CMDQUE */
memcpy(&arr[8], "Linux ", 8);
memcpy(&arr[16], "scsi_debug ", 16);
memcpy(&arr[32], "0003", 4);
memcpy(&arr[8], vendor_id, 8);
memcpy(&arr[16], product_id, 16);
memcpy(&arr[32], product_rev, 4);
memcpy(buff, arr, min_len);
return 0;
}
/* <<Following mode page info copied from ST318451LW>> */
static int sdebug_err_recov_pg(unsigned char * p, int pcontrol, int target)
static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
{ /* Read-Write Error Recovery page for mode_sense */
unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
5, 0, 0xff, 0xff};
......@@ -558,7 +524,7 @@ static int sdebug_err_recov_pg(unsigned char * p, int pcontrol, int target)
return sizeof(err_recov_pg);
}
static int sdebug_disconnect_pg(unsigned char * p, int pcontrol, int target)
static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
{ /* Disconnect-Reconnect page for mode_sense */
unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0};
......@@ -569,7 +535,25 @@ static int sdebug_disconnect_pg(unsigned char * p, int pcontrol, int target)
return sizeof(disconnect_pg);
}
static int sdebug_caching_pg(unsigned char * p, int pcontrol, int target)
static int resp_format_pg(unsigned char * p, int pcontrol, int target)
{ /* Format device page for mode_sense */
unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0x40, 0, 0, 0};
memcpy(p, format_pg, sizeof(format_pg));
p[10] = (N_SECTOR >> 8) & 0xff;
p[11] = N_SECTOR & 0xff;
p[12] = (SECT_SIZE >> 8) & 0xff;
p[13] = SECT_SIZE & 0xff;
if (DEV_REMOVEABLE(target))
p[20] |= 0x20; /* should agree with INQUIRY */
if (1 == pcontrol)
memset(p + 2, 0, sizeof(format_pg) - 2);
return sizeof(format_pg);
}
static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
{ /* Caching page for mode_sense */
unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
......@@ -580,7 +564,7 @@ static int sdebug_caching_pg(unsigned char * p, int pcontrol, int target)
return sizeof(caching_pg);
}
static int sdebug_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
{ /* Control mode page for mode_sense */
unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
......@@ -594,9 +578,9 @@ static int sdebug_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
#define SDEBUG_MAX_MSENSE_SZ 256
static int scsi_debug_mode_sense(unsigned char * cmd, int target,
static int resp_mode_sense(unsigned char * cmd, int target,
unsigned char * buff, int bufflen,
Sdebug_dev_info * devip)
struct sdebug_dev_info * devip)
{
unsigned char dbd;
int pcontrol, pcode;
......@@ -622,15 +606,14 @@ static int scsi_debug_mode_sense(unsigned char * cmd, int target,
memset(buff, 0, bufflen);
memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
if (0x3 == pcontrol) { /* Saving values not supported */
mk_sense_buffer(devip, 1, ILLEGAL_REQUEST, 0x39, 0, 14);
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x39, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
dev_spec = DEV_READONLY(target) ? 0x80 : 0x0;
if (msense_6) {
arr[2] = dev_spec;
offset = 4;
}
else {
} else {
arr[3] = dev_spec;
offset = 8;
}
......@@ -638,30 +621,34 @@ static int scsi_debug_mode_sense(unsigned char * cmd, int target,
switch (pcode) {
case 0x1: /* Read-Write error recovery page, direct access */
len = sdebug_err_recov_pg(ap, pcontrol, target);
len = resp_err_recov_pg(ap, pcontrol, target);
offset += len;
break;
case 0x2: /* Disconnect-Reconnect page, all devices */
len = sdebug_disconnect_pg(ap, pcontrol, target);
len = resp_disconnect_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3: /* Format device page, direct access */
len = resp_format_pg(ap, pcontrol, target);
offset += len;
break;
case 0x8: /* Caching page, direct access */
len = sdebug_caching_pg(ap, pcontrol, target);
len = resp_caching_pg(ap, pcontrol, target);
offset += len;
break;
case 0xa: /* Control Mode page, all devices */
len = sdebug_ctrl_m_pg(ap, pcontrol, target);
len = resp_ctrl_m_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3f: /* Read all Mode pages */
len = sdebug_err_recov_pg(ap, pcontrol, target);
len += sdebug_disconnect_pg(ap + len, pcontrol, target);
len += sdebug_caching_pg(ap + len, pcontrol, target);
len += sdebug_ctrl_m_pg(ap + len, pcontrol, target);
len = resp_err_recov_pg(ap, pcontrol, target);
len += resp_disconnect_pg(ap + len, pcontrol, target);
len += resp_caching_pg(ap + len, pcontrol, target);
len += resp_ctrl_m_pg(ap + len, pcontrol, target);
offset += len;
break;
default:
mk_sense_buffer(devip, 1, ILLEGAL_REQUEST, 0x24, 0, 14);
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x24, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
if (msense_6)
......@@ -675,8 +662,8 @@ static int scsi_debug_mode_sense(unsigned char * cmd, int target,
return 0;
}
static int scsi_debug_read(Scsi_Cmnd * SCpnt, int upper_blk, int block,
int num, int * errstsp, Sdebug_dev_info * devip)
static int resp_read(Scsi_Cmnd * SCpnt, int upper_blk, int block, int num,
struct sdebug_dev_info * devip)
{
unsigned char *buff = (unsigned char *) SCpnt->request_buffer;
int nbytes, sgcount;
......@@ -685,30 +672,17 @@ static int scsi_debug_read(Scsi_Cmnd * SCpnt, int upper_blk, int block,
unsigned long iflags;
if (upper_blk || (block + num > CAPACITY)) {
*errstsp = (COMMAND_COMPLETE << 8) |
(CHECK_CONDITION << 1);
mk_sense_buffer(devip, 1, ILLEGAL_REQUEST, 0x21, 0, 14);
return 1;
}
#if defined(SCSI_SETUP_LATENCY) || defined(SCSI_DATARATE)
{
int delay = SCSI_SETUP_LATENCY;
delay += SCpnt->request->nr_sectors * SCSI_DATARATE;
if (delay)
usleep(delay);
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x21, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
#endif
if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
(block >= OPT_MEDIUM_ERR_ADDR) &&
(block < (OPT_MEDIUM_ERR_ADDR + num))) {
*errstsp = (COMMAND_COMPLETE << 8) |
(CHECK_CONDITION << 1);
mk_sense_buffer(devip, 1, MEDIUM_ERROR, 0x11, 0, 14);
mk_sense_buffer(devip, MEDIUM_ERROR, 0x11, 0, 14);
/* claim unrecoverable read error */
return 1;
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
read_lock_irqsave(&sdebug_atomic_rw, iflags);
read_lock_irqsave(&atomic_rw, iflags);
sgcount = 0;
nbytes = bufflen;
/* printk(KERN_INFO "scsi_debug_read: block=%d, tot_bufflen=%d\n",
......@@ -716,46 +690,29 @@ static int scsi_debug_read(Scsi_Cmnd * SCpnt, int upper_blk, int block,
if (SCpnt->use_sg) {
sgcount = 0;
sgpnt = (struct scatterlist *) buff;
buff = sdebug_scatg2virt(&sgpnt[sgcount]);
buff = scatg2virt(&sgpnt[sgcount]);
bufflen = sgpnt[sgcount].length;
}
*errstsp = 0;
do {
memcpy(buff, fake_storep + (block * SECT_SIZE), bufflen);
#if 0
/* Simulate a disk change */
if (block == 0xfff0) {
sense_buffer[0] = 0x70;
sense_buffer[2] = UNIT_ATTENTION;
starts[0] += 10;
starts[1] += 10;
starts[2] += 10;
*errstsp = (COMMAND_COMPLETE << 8) |
(CHECK_CONDITION << 1);
read_unlock_irqrestore(&sdebug_atomic_rw, iflags);
return 1;
} /* End phony disk change code */
#endif
nbytes -= bufflen;
if (SCpnt->use_sg) {
block += bufflen >> POW2_SECT_SIZE;
sgcount++;
if (nbytes) {
buff = sdebug_scatg2virt(&sgpnt[sgcount]);
buff = scatg2virt(&sgpnt[sgcount]);
bufflen = sgpnt[sgcount].length;
}
}
else if (nbytes > 0)
printk(KERN_WARNING "sdebug_read: unexpected "
} else if (nbytes > 0)
printk(KERN_WARNING "scsi_debug:resp_read: unexpected "
"nbytes=%d\n", nbytes);
} while (nbytes);
read_unlock_irqrestore(&sdebug_atomic_rw, iflags);
read_unlock_irqrestore(&atomic_rw, iflags);
return 0;
}
static int scsi_debug_write(Scsi_Cmnd * SCpnt, int upper_blk, int block,
int num, int * errstsp, Sdebug_dev_info * devip)
static int resp_write(Scsi_Cmnd * SCpnt, int upper_blk, int block, int num,
struct sdebug_dev_info * devip)
{
unsigned char *buff = (unsigned char *) SCpnt->request_buffer;
int nbytes, sgcount;
......@@ -764,22 +721,19 @@ static int scsi_debug_write(Scsi_Cmnd * SCpnt, int upper_blk, int block,
unsigned long iflags;
if (upper_blk || (block + num > CAPACITY)) {
*errstsp = (COMMAND_COMPLETE << 8) |
(CHECK_CONDITION << 1);
mk_sense_buffer(devip, 1, ILLEGAL_REQUEST, 0x21, 0, 14);
return 1;
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x21, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
write_lock_irqsave(&sdebug_atomic_rw, iflags);
write_lock_irqsave(&atomic_rw, iflags);
sgcount = 0;
nbytes = bufflen;
if (SCpnt->use_sg) {
sgcount = 0;
sgpnt = (struct scatterlist *) buff;
buff = sdebug_scatg2virt(&sgpnt[sgcount]);
buff = scatg2virt(&sgpnt[sgcount]);
bufflen = sgpnt[sgcount].length;
}
*errstsp = 0;
do {
memcpy(fake_storep + (block * SECT_SIZE), buff, bufflen);
......@@ -788,104 +742,64 @@ static int scsi_debug_write(Scsi_Cmnd * SCpnt, int upper_blk, int block,
block += bufflen >> POW2_SECT_SIZE;
sgcount++;
if (nbytes) {
buff = sdebug_scatg2virt(&sgpnt[sgcount]);
buff = scatg2virt(&sgpnt[sgcount]);
bufflen = sgpnt[sgcount].length;
}
}
else if (nbytes > 0)
printk(KERN_WARNING "sdebug_write: "
} else if (nbytes > 0)
printk(KERN_WARNING "scsi_debug:resp_write: "
"unexpected nbytes=%d\n", nbytes);
} while (nbytes);
write_unlock_irqrestore(&sdebug_atomic_rw, iflags);
write_unlock_irqrestore(&atomic_rw, iflags);
return 0;
}
/* A "high" level interrupt handler. This should be called once per jiffy
* to simulate a regular scsi disk. We use a timer to do this. */
static void scsi_debug_intr_handle(unsigned long indx)
static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
int bufflen, struct sdebug_dev_info * devip)
{
Scsi_Cmnd *SCtmp;
void (*my_done) (Scsi_Cmnd *);
#if 0
del_timer(&timeout[indx]);
#endif
SCtmp = (Scsi_Cmnd *) SCint[indx];
my_done = do_done[indx];
do_done[indx] = NULL;
timeout[indx].function = NULL;
SCint[indx] = NULL;
unsigned int alloc_len;
int select_report = (int)cmd[2];
if (!my_done) {
printk(KERN_ERR "scsi_debug_intr_handle: Unexpected "
"interrupt\n");
return;
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
if ((alloc_len < 16) || (select_report > 2)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x24, 0, 14);
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
if (bufflen > 3) {
memset(buff, 0, bufflen);
buff[3] = 8;
}
#if 0
printk(KERN_INFO "In intr_handle...");
printk(KERN_INFO "...done %d %x %d %d\n", i, my_done, to, jiffies);
printk(KERN_INFO "In intr_handle: %d %x %x\n", i, SCtmp, my_done);
#endif
my_done(SCtmp);
#if 0
printk(KERN_INFO "Called done.\n");
#endif
}
static int initialized = 0;
static int do_init(void)
{
int sz = STORE_SIZE;
starts[3] = CAPACITY;
fake_storep = vmalloc(sz);
if (NULL == fake_storep)
return 1;
memset(fake_storep, 0, sz);
sz = sizeof(done_fct_t) * SCSI_DEBUG_MAILBOXES;
do_done = kmalloc(sz, GFP_ATOMIC);
if (NULL == do_done)
goto out;
memset((void *)do_done, 0, sz);
sz = sizeof(struct timer_list) * SCSI_DEBUG_MAILBOXES;
timeout = kmalloc(sz, GFP_ATOMIC);
if (NULL == timeout)
goto out;
memset(timeout, 0, sz);
sz = sizeof(Scsi_Cmnd *) * SCSI_DEBUG_MAILBOXES;
SCint = kmalloc(sz, GFP_ATOMIC);
if (NULL == SCint)
goto out;
memset(SCint, 0, sz);
return 0;
out:
if (fake_storep)
vfree(fake_storep);
if (do_done)
kfree((void *)do_done);
if (timeout)
kfree(timeout);
if (SCint)
kfree(SCint);
return 1;
}
static void do_end(void)
/* When timer goes off this function is called. */
static void timer_intr_handler(unsigned long indx)
{
kfree(SCint);
kfree(timeout);
kfree((void *)do_done);
vfree(fake_storep);
struct sdebug_queued_cmd * sqcp;
unsigned int iflags;
if (indx >= SCSI_DEBUG_CANQUEUE) {
printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
"large\n");
return;
}
spin_lock_irqsave(&queued_arr_lock, iflags);
sqcp = &queued_arr[(int)indx];
if (! sqcp->in_use) {
printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
"interrupt\n");
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return;
}
sqcp->in_use = 0;
if (sqcp->done_funct)
sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
sqcp->done_funct = NULL;
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
static int initialized = 0;
static int num_present = 0;
static const char * sdebug_proc_name = "scsi_debug";
static int scsi_debug_detect(Scsi_Host_Template * tpnt)
{
......@@ -895,28 +809,41 @@ static int scsi_debug_detect(Scsi_Host_Template * tpnt)
printk(KERN_INFO "scsi_debug: detect\n");
if (0 == initialized) {
++initialized;
sz = sizeof(Sdebug_dev_info) * scsi_debug_num_devs;
devInfop = kmalloc(sz, GFP_ATOMIC);
sz = sizeof(struct sdebug_dev_info) * scsi_debug_num_devs;
devInfop = vmalloc(sz);
if (NULL == devInfop) {
printk(KERN_ERR "scsi_debug_detect: out of "
"memory, 0.5\n");
return 0;
}
memset(devInfop, 0, sz);
if (do_init()) {
sz = STORE_SIZE;
fake_storep = vmalloc(sz);
if (NULL == fake_storep) {
printk(KERN_ERR "scsi_debug_detect: out of memory"
", 0\n");
return 0;
}
for (k = 0; k < NUM_SENSE_BUFFS; ++k)
sense_buffers[k][0] = 0x70;
for (k = 0; k < NR_HOSTS_PRESENT; k++) {
tpnt->proc_name = "scsi_debug"; /* In the loop??? */
scsi_register(tpnt, 0);
memset(fake_storep, 0, sz);
init_all_queued();
tpnt->proc_name = (char *)sdebug_proc_name;
for (num_present = 0, k = 0; k < NR_HOSTS_PRESENT; k++) {
if (NULL == scsi_register(tpnt, 0))
printk(KERN_ERR "scsi_debug_detect: "
"scsi_register failed k=%d\n", k);
else
++num_present;
}
return NR_HOSTS_PRESENT;
#ifdef DRIVERFS_SUPPORT
if (num_present) {
sdebug_driverfs_driver.name = (char *)sdebug_proc_name;
sdebug_driverfs_driver.bus = &scsi_driverfs_bus_type;
driver_register(&sdebug_driverfs_driver);
do_create_driverfs_files();
}
else {
#endif
return num_present;
} else {
printk(KERN_WARNING "scsi_debug_detect: called again\n");
return 0;
}
......@@ -929,51 +856,52 @@ static int scsi_debug_release(struct Scsi_Host * hpnt)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: release\n");
stop_all_queued();
scsi_unregister(hpnt);
if (++num_releases != NR_HOSTS_PRESENT)
return 0;
do_end();
kfree(devInfop);
if (++num_releases == num_present) {
#ifdef DRIVERFS_SUPPORT
do_remove_driverfs_files();
remove_driver(&sdebug_driverfs_driver);
// driver_unregister(&sdebug_driverfs_driver);
#endif
vfree(fake_storep);
vfree(devInfop);
}
return 0;
}
static Sdebug_dev_info * devInfoReg(Scsi_Device * sdp)
static struct sdebug_dev_info * devInfoReg(Scsi_Device * sdp)
{
int k;
unsigned short host_no, id;
Sdebug_dev_info * devip;
struct sdebug_dev_info * devip;
host_no = sdp->host->host_no;
id = (unsigned short)sdp->id;
for (k = 0; k < scsi_debug_num_devs; ++k) {
devip = &devInfop[k];
if (devip->sdp && (host_no == devip->host_no) &&
(id == devip->id)) {
devip->sdp = sdp; /* overwrite previous sdp */
if (devip->sdp == sdp)
return devip;
}
for (k = 0; k < scsi_debug_num_devs; ++k) {
devip = &devInfop[k];
if (NULL == devip->sdp) {
devip->sdp = sdp;
devip->host_no = host_no;
devip->id = id;
devip->reset = 1;
devip->sb_index = 0;
memset(devip->sense_buff, 0, SDEBUG_SENSE_LEN);
devip->sense_buff[0] = 0x70;
return devip;
}
}
return NULL;
}
static void mk_sense_buffer(Sdebug_dev_info * devip, int index, int key,
static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
int asc, int asq, int inbandLen)
{
char * sbuff;
if ((index < 0) || (index >= NUM_SENSE_BUFFS))
return;
if (devip)
devip->sb_index = index;
sbuff = &sense_buffers[index][0];
memset(sbuff, 0, SENSE_BUFF_LEN);
unsigned char * sbuff;
sbuff = devip->sense_buff;
memset(sbuff, 0, SDEBUG_SENSE_LEN);
if (inbandLen > SDEBUG_SENSE_LEN)
inbandLen = SDEBUG_SENSE_LEN;
sbuff[0] = 0x70;
sbuff[2] = key;
sbuff[7] = (inbandLen > 7) ? (inbandLen - 8) : 0;
......@@ -985,30 +913,13 @@ static int scsi_debug_abort(Scsi_Cmnd * SCpnt)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: abort\n");
#if 1
++num_aborts;
stop_queued_cmnd(SCpnt);
return SUCCESS;
#else
int j;
void (*my_done) (Scsi_Cmnd *);
unsigned long iflags;
SCpnt->result = SCpnt->abort_reason << 16;
for (j = 0; j < SCSI_DEBUG_MAILBOXES; j++) {
if (SCpnt == SCint[j]) {
my_done = do_done[j];
my_done(SCpnt);
spin_lock_irqsave(&mailbox_lock, iflags);
timeout[j] = 0;
SCint[j] = NULL;
do_done[j] = NULL;
spin_unlock_irqrestore(&mailbox_lock, iflags);
}
}
return SCSI_ABORT_SNOOZE;
#endif
}
static int scsi_debug_biosparam(Disk * disk, struct block_device *dev, int *info)
static int scsi_debug_biosparam(Disk * disk, struct block_device * bdev,
int *info)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: biosparam\n");
......@@ -1067,12 +978,124 @@ static int scsi_debug_host_reset(Scsi_Cmnd * SCpnt)
++num_host_resets;
for (k = 0; k < scsi_debug_num_devs; ++k)
devInfop[k].reset = 1;
stop_all_queued();
return SUCCESS;
}
/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
static int stop_queued_cmnd(struct scsi_cmnd * cmnd)
{
unsigned long iflags;
int k;
struct sdebug_queued_cmd * sqcp;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
sqcp = &queued_arr[k];
if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
del_timer_sync(&sqcp->cmnd_timer);
sqcp->in_use = 0;
sqcp->a_cmnd = NULL;
break;
}
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0;
}
/* Deletes (stops) timers of all queued commands */
static void stop_all_queued(void)
{
unsigned long iflags;
int k;
struct sdebug_queued_cmd * sqcp;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
sqcp = &queued_arr[k];
if (sqcp->in_use && sqcp->a_cmnd) {
del_timer_sync(&sqcp->cmnd_timer);
sqcp->in_use = 0;
sqcp->a_cmnd = NULL;
}
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
/* Initializes timers in queued array */
static void init_all_queued(void)
{
unsigned long iflags;
int k;
struct sdebug_queued_cmd * sqcp;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
sqcp = &queued_arr[k];
init_timer(&sqcp->cmnd_timer);
sqcp->in_use = 0;
sqcp->a_cmnd = NULL;
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
static int schedule_resp(struct scsi_cmnd * cmnd,
struct sdebug_dev_info * devip,
done_funct_t done, int scsi_result, int delta_jiff)
{
int k, num;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
printk(KERN_INFO "scsi_debug: cmd ");
for (k = 0, num = cmnd->cmd_len; k < num; ++k)
printk("%02x ", (int)cmnd->cmnd[k]);
printk("result=0x%x\n", scsi_result);
}
if (cmnd && devip) {
/* simulate autosense by this driver */
if (CHECK_CONDITION == status_byte(scsi_result))
memcpy(cmnd->sense_buffer, devip->sense_buff,
(SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
}
if (delta_jiff <= 0) {
if (cmnd)
cmnd->result = scsi_result;
if (done)
done(cmnd);
return 0;
} else {
unsigned long iflags;
int k;
struct sdebug_queued_cmd * sqcp = NULL;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
sqcp = &queued_arr[k];
if (! sqcp->in_use)
break;
}
if (k >= SCSI_DEBUG_CANQUEUE) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
return 1; /* report busy to mid level */
}
sqcp->in_use = 1;
sqcp->a_cmnd = cmnd;
sqcp->scsi_result = scsi_result;
sqcp->done_funct = done;
sqcp->cmnd_timer.function = timer_intr_handler;
sqcp->cmnd_timer.data = k;
sqcp->cmnd_timer.expires = jiffies + delta_jiff;
add_timer(&sqcp->cmnd_timer);
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return 0;
}
}
#ifndef MODULE
static int __init scsi_debug_num_devs_setup(char *str)
static int __init num_devs_setup(char *str)
{
int tmp;
......@@ -1086,10 +1109,9 @@ static int __init scsi_debug_num_devs_setup(char *str)
return 0;
}
}
__setup("scsi_debug_num_devs=", num_devs_setup);
__setup("scsi_debug_num_devs=", scsi_debug_num_devs_setup);
static int __init scsi_debug_dev_size_mb_setup(char *str)
static int __init dev_size_mb_setup(char *str)
{
int tmp;
......@@ -1104,10 +1126,9 @@ static int __init scsi_debug_dev_size_mb_setup(char *str)
return 0;
}
}
__setup("scsi_debug_dev_size_mb=", dev_size_mb_setup);
__setup("scsi_debug_dev_size_mb=", scsi_debug_dev_size_mb_setup);
static int __init scsi_debug_opts_setup(char *str)
static int __init opts_setup(char *str)
{
int tmp;
......@@ -1122,8 +1143,41 @@ static int __init scsi_debug_opts_setup(char *str)
return 0;
}
}
__setup("scsi_debug_opts=", opts_setup);
static int __init every_nth_setup(char *str)
{
int tmp;
if (get_option(&str, &tmp) == 1) {
if (tmp > 0)
scsi_debug_every_nth = tmp;
return 1;
} else {
printk(KERN_INFO "scsi_debug_every_nth: usage "
"scsi_debug_every_nth=<n>\n"
" timeout every nth command (when ...)\n");
return 0;
}
}
__setup("scsi_debug_every_nth=", every_nth_setup);
static int __init delay_setup(char *str)
{
int tmp;
if (get_option(&str, &tmp) == 1) {
scsi_debug_delay = tmp;
return 1;
} else {
printk(KERN_INFO "scsi_debug_delay: usage "
"scsi_debug_delay=<n>\n"
" delay response <n> jiffies\n");
return 0;
}
}
__setup("scsi_debug_delay=", delay_setup);
__setup("scsi_debug_opts=", scsi_debug_opts_setup);
#endif
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
......@@ -1134,10 +1188,11 @@ MODULE_PARM(scsi_debug_dev_size_mb, "i");
MODULE_PARM_DESC(scsi_debug_dev_size_mb, "size in MB of ram shared by devs");
MODULE_PARM(scsi_debug_opts, "i");
MODULE_PARM_DESC(scsi_debug_opts, "1->noise, 2->medium_error, 4->...");
#ifdef MODULE_LICENSE
MODULE_PARM(scsi_debug_every_nth, "i");
MODULE_PARM_DESC(scsi_debug_every_nth, "timeout every nth command(def=100)");
MODULE_PARM(scsi_debug_delay, "i");
MODULE_PARM_DESC(scsi_debug_delay, "# of jiffies to delay response(def=1)");
MODULE_LICENSE("GPL");
#endif
static char sdebug_info[256];
......@@ -1172,17 +1227,21 @@ static int scsi_debug_proc_info(char *buffer, char **start, off_t offset,
if (1 != sscanf(arr, "%d", &pos))
return -EINVAL;
scsi_debug_opts = pos;
if (SCSI_DEBUG_OPT_EVERY_NTH & scsi_debug_opts)
scsi_debug_cmnd_count = 0;
return length;
}
begin = 0;
pos = len = sprintf(buffer, "scsi_debug adapter driver, %s\n"
"num_devs=%d, shared (ram) size=%d MB, opts=0x%x\n"
"sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
"number of aborts=%d, device_reset=%d, bus_resets=%d, "
"num_devs=%d, shared (ram) size=%d MB, opts=0x%x, "
"every_nth=%d(curr:%d)\n"
"sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d, "
"delay=%d\nnumber of aborts=%d, device_reset=%d, bus_resets=%d, "
"host_resets=%d\n",
scsi_debug_version_str, scsi_debug_num_devs,
scsi_debug_dev_size_mb, scsi_debug_opts, SECT_SIZE,
N_CYLINDER, N_HEAD, N_SECTOR,
scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
scsi_debug_cmnd_count,
SECT_SIZE, N_CYLINDER, N_HEAD, N_SECTOR, scsi_debug_delay,
num_aborts, num_dev_resets, num_bus_resets, num_host_resets);
if (pos < offset) {
len = 0;
......@@ -1196,8 +1255,86 @@ static int scsi_debug_proc_info(char *buffer, char **start, off_t offset,
return (len);
}
/* Eventually this will go into an include file, but this will be later */
static Scsi_Host_Template driver_template = SCSI_DEBUG_TEMPLATE;
#ifdef DRIVERFS_SUPPORT
static ssize_t sdebug_delay_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_delay);
}
#include "scsi_module.c"
static ssize_t sdebug_delay_write(struct device_driver * ddp,
const char * buf, size_t count, loff_t off)
{
int delay;
char work[20];
if (off)
return 0;
if (1 == sscanf(buf, "%10s", work)) {
if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
scsi_debug_delay = delay;
return count;
}
}
return -EINVAL;
}
DRIVER_ATTR(delay, "delay", S_IRUGO | S_IWUSR, sdebug_delay_read,
sdebug_delay_write)
static ssize_t sdebug_opts_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "0x%x\n", scsi_debug_opts);
}
static ssize_t sdebug_opts_write(struct device_driver * ddp,
const char * buf, size_t count, loff_t off)
{
int opts;
char work[20];
if (off)
return 0;
if (1 == sscanf(buf, "%10s", work)) {
if (0 == strnicmp(work,"0x", 2)) {
if (1 == sscanf(&work[2], "%x", &opts))
goto opts_done;
} else {
if (1 == sscanf(work, "%d", &opts))
goto opts_done;
}
}
return -EINVAL;
opts_done:
scsi_debug_opts = opts;
return count;
}
DRIVER_ATTR(opts, "opts", S_IRUGO | S_IWUSR, sdebug_opts_read,
sdebug_opts_write)
static ssize_t sdebug_num_devs_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_num_devs);
}
DRIVER_ATTR(num_devs, "num_devs", S_IRUGO, sdebug_num_devs_read, NULL)
static void do_create_driverfs_files()
{
driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_devs);
}
static void do_remove_driverfs_files()
{
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_devs);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
}
#endif
#include "scsi_module.c"
drivers/scsi/scsi_debug.h
View file @ bb70b680
#ifndef _SCSI_DEBUG_H
#include <linux/types.h>
#include <linux/kdev_t.h>
static int scsi_debug_detect(Scsi_Host_Template *);
static int scsi_debug_release(struct Scsi_Host *);
/* static int scsi_debug_command(Scsi_Cmnd *); */
static int scsi_debug_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *));
static int scsi_debug_abort(Scsi_Cmnd *);
static int scsi_debug_ioctl(Scsi_Device *, int, void *);
static int scsi_debug_biosparam(Disk *, struct block_device *, int[]);
static int scsi_debug_abort(Scsi_Cmnd *);
static int scsi_debug_bus_reset(Scsi_Cmnd *);
static int scsi_debug_device_reset(Scsi_Cmnd *);
static int scsi_debug_host_reset(Scsi_Cmnd *);
......@@ -20,29 +23,29 @@ static const char * scsi_debug_info(struct Scsi_Host *);
/*
* This driver is written for the lk 2.5 series
*/
#define SCSI_DEBUG_CANQUEUE 255
#define SCSI_DEBUG_CANQUEUE 255 /* needs to be >= 1 */
#define SCSI_DEBUG_MAX_CMD_LEN 16
#define SCSI_DEBUG_TEMPLATE \
{proc_info: scsi_debug_proc_info, \
name: "SCSI DEBUG", \
info: scsi_debug_info, \
detect: scsi_debug_detect, \
release: scsi_debug_release, \
ioctl: scsi_debug_ioctl, \
queuecommand: scsi_debug_queuecommand, \
eh_abort_handler: scsi_debug_abort, \
eh_bus_reset_handler: scsi_debug_bus_reset, \
eh_device_reset_handler: scsi_debug_device_reset, \
eh_host_reset_handler: scsi_debug_host_reset, \
bios_param: scsi_debug_biosparam, \
can_queue: SCSI_DEBUG_CANQUEUE, \
this_id: 7, \
sg_tablesize: 64, \
cmd_per_lun: 3, \
unchecked_isa_dma: 0, \
use_clustering: ENABLE_CLUSTERING, \
}
static Scsi_Host_Template driver_template = {
.proc_info = scsi_debug_proc_info,
.name = "SCSI DEBUG",
.info = scsi_debug_info,
.detect = scsi_debug_detect,
.release = scsi_debug_release,
.ioctl = scsi_debug_ioctl,
.queuecommand = scsi_debug_queuecommand,
.eh_abort_handler = scsi_debug_abort,
.eh_bus_reset_handler = scsi_debug_bus_reset,
.eh_device_reset_handler = scsi_debug_device_reset,
.eh_host_reset_handler = scsi_debug_host_reset,
.bios_param = scsi_debug_biosparam,
.can_queue = SCSI_DEBUG_CANQUEUE,
.this_id = 7,
.sg_tablesize = 64,
.cmd_per_lun = 3,
.unchecked_isa_dma = 0,
.use_clustering = ENABLE_CLUSTERING,
}; /* the name 'driver_template' is used by scsi_module.c */
#endif
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